# 实例1
def swapList(newList):
    size = len(newList)
    temp = newList[0]
    newList[0] = newList[size - 1]
    newList[size - 1] = temp
    return newList
newList = [1, 2, 3]
print(swapList(newList))
print()

# 实例2
def swapList(newList):
    newList[0], newList[-1] = newList[-1], newList[0]

    return newList


newList = [1, 2, 3]
print(swapList(newList))
print()

# 实例3
def swapList(list):
    get = list[-1], list[0]

    list[0], list[-1] = get

    return list


newList = [1, 2, 3]
print(swapList(newList))